20078+3055 COU  31

 
 
20h 07m 52.21s +30 54' 11.9" P.A. 325 sep 11 mag 10.80,13.30 Sp M4
 
 
Coord 2000
20078+3055
Discov num
COU  31
Comp
Coord arcsec 2000
20 07 52.21 +30 54 11.9
Date first
1902
Date last
2016
Obs
12
Pa first
323
Pa last
325
P.A. Now (θ)
325°
Sep first
11.4
Sep last
11.0
Sep. Now (ρ)
11"
Mag pri
10.80
Mag sec
13.30
delta mag (ΔM)
2.5
Spectral class
M4 (red)
Pri motion ra
+001
Sec motion ra
+001
Pri motion dec
-004
Sec motion dec
-005
Notes
rPM=0.196 (< 0.3, Physical double)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
324.5
Precise sep
11.002
Constellation
Cygnus
SAO
69458
Tycho2
2671-02485-1
Gaia DR2
27834436736
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
20078+3055 COU 31 1963 2 325 10.5 10.80 13.30 M4 200752.21+305411.9
20078+3055 COU 31 2002 3 325 11.1 10.80 13.30 M4 200752.21+305411.9
20078+3055 COU 31 2012 4 325 11.3 10.80 13.30 M4 200752.21+305411.9
20078+3055 COU 31 2015 6 326 11.1 10.80 13.30 M4 200752.21+305411.9
20078+3055 COU 31 2016 7 325 11.0 10.80 13.30 M4 200752.21+305411.9

If you need more information about this double, apply for a data request form to the WDS.